Motherboard for coreprotocol loop test set device

V diplomskem delu sta opisana načrtovanje in izdelava osnovne plošče testne naprave za testiranje in diagnosticiranje požarne zanke. Požarni sistem je v osnovi sestavljen iz naprave za javljanje požara – požarne centrale, ene ali več požarnih zank in raznih vhodno-izhodnih enot, ki so potrebne za učinkovito delovanje požarnega sistema. Požarna zanka je vodilo, fizično samo dva vodnika, na katerega so priključeni različni požarni senzorji in ustrezne izhodne enote, ki imajo vsaka svoj unikaten naslov. Cilj naloge je bila izdelava testne naprave, ki se uporablja za testiranje pravilnega delovanja požarne zanke pred priključitvijo na centralo ali za odpravljanje napak med delovanjem. Testna naprava je sestavljena iz mikroprocesorske enote in osnovne plošče. Uporabniški vmesnik na mikroprocesorski enoti omogoča upravljanje preko zaslona na dotik. Podatki ali zahteve se preko serijske povezave prenašajo na osnovno ploščo. Posamezni sklopi na osnovni plošči so narejeni tako, da se generirajo ustrezni napetostni in tokovni nivoji za napajanje zanke, generirajo ustrezni napetostni impulzi za komunikacijo z elementi na zanki in ovrednoti njihov odziv. Poleg tega naprava omogoča različne meritve na zanki, kot so tok in napetosti na zanki, prisotnost kratkega ali zemeljskega stika in dolžino požarne zanke. Celotna naprava je prenosna, zato je na osnovni plošči poskrbljeno za delovanje iz zunanjega napajalnega vira ali iz vgrajenih Li-Ion baterij in za njihovo polnjenje. Za mikroprocesorsko enoto smo uporabili Raspberry Pi3 z ustreznim 7" zaslonom, uporabniški vmesnik je napisan v Pythonu, jedro osnovne plošče pa je ARM mikrokrmilnik STM32F072 podjetja ST. V delu je opisan potek od začetne zamisli do izvedbe posameznih sklopov, izdelave prototipa, testiranja na SIQ in opis testnega postopka za testiranje v redni proizvodnji.The diploma thesis describes the design and manufacture of the motherboard of the test apparatus for testing and diagnosing the fire loop. The fire system consists essentially of a fire alarm device - fire control panels, one or more fire loops and various input output units necessary for the effective operation of the fire system. A fire loop is a bus, physically only two wires to which different fire sensors are connected and the corresponding output units, each with their own unique address. The goal of the task is to create a test device used to test the proper functioning of the fire loop before connecting it to a fire panel or for troubleshooting during operation.The test device consist of a microprocessor unit and a motherboard. The user interface on the microprocessor unit allows to operate via the touch screen. Data or requests are transmitted via the serial connection to the motherboard. Individual assemblies are designed to generate appropriate voltage and current levels for the loop supply, generate appropriate voltage pulses for communication with loop elements, and evaluate the response from them. In addition, the device provides various measurements on the loop, such as current and voltage on the loop, the presence of short or earth contact, and the length of the fire loop. The entire device is portable, so it can work from a wall-mounted power supply or from built-in Li-Ion batteries and charging them. For the microprocessor unit the Raspberry Pi3 was used with a suitable 7" display, the user interface is written in Python and the core of the base plate is the STM32F072 ARM microcontroller. The diploma thesis describes the course from the initial idea to the implementation of individual assemblies, the production of prototype, the testing on SIQ and the description of the test procedure for testing in regular production